Finding the Fourth Proportional to 28,181.98, 42,273.74 and 8,460.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,181.98 : 42,273.74 = 8,460.54 : x
2. Step 2: Convert to fraction form
   28,181.98/42,273.74 = 8,460.54/x
3. Step 3: Cross multiply
   28,181.98x = 42,273.74 × 8,460.54
4. Step 4: Simplify right side
   28,181.98x = 357,658,689.37
5. Step 5: Solve for x
   x = 357,658,689.37/28,181.98
6. Step 6: Final answer
   x = 12,691.04